Who is Remy Giraud from The Guernsey Literary and Potato Peel Pie Society and what is their importance?

Remy Giraud is a French woman who is imprisoned at Ravensbruck Concentration Camp with Elizabeth, and they become friends. She writes to the members of the Guernsey Literary and Potato Peel Pie Society to inform them that Elizabeth was executed at the camp. Dawsey convinces Remy to come to Guernsey, but she is obviously not doing well because she was very traumatized by her time spent at Ravensbruck. When she gets an apprenticeship at a bakery in Paris, Remy leaves Guernsey but promises to visit again. Juliet suspects that Dawsey loves Remy, as does Isola who tries in vain to find evidence of his infatuation.